Isuzu Trooper (1996-2001 year) Electrical Manual — part 11
IGNITION SYSTEM
Condenser
Dash Fuse Box
Engine or Powertrain Control
Module (ECM or PCM)
ION Sensing Module
No. 1 Ignition Coil
No. 2 Ignition Coil
No. 3 Ignition Coil
No. 4 Ignition Coil
No. 5 Ignition Coil
No. 6 Ignition Coil
Component Index
20
IGNITION SYSTEM
62
E-22
BLK/ORN
DASH
FUSE
BOX
C-9
IG. COIL
15A
RED
Ignition
input
1
14
H-7
E-29
See Ground
Distribution,
page 14-10.
BLK
No. 1
Ignition
coil control
BLK/BLU
2
To A on page 20-1.
BLK/ORN
3
7
E-16
BLK/
ORN
NO. 1
IGNITION
COIL
RED/
BLU
1
BLK/BLU
2
To B on page 20-1.
BLK/ORN
3
NO. 3
IGNITION
COIL
RED/
BLU
1
BLK/BLU
2
To C on page 20-1.
BLK/ORN
3
NO. 5
IGNITION
COIL
3
1
E-17
3
E-18
2
H-6
BLK/ORN
BLK/ORN
Ground
1
10
RED
25
E-21
No. 3
Ignition
coil control
8
RED/BLU
Coil Module
19
E-22
No. 5
Ignition
coil control
9
RED/YEL
E-16
HOT IN ON OR START
C
B
A
E-37
E-38
E-39
E-37
E-38
E-39
Circuit Schematic
20-1
IGNITION SYSTEM
26
E-21
ENGINE or
POWERTRAIN
CONTROL
MODULE
(ECM or PCM)
Solid State:
Do not check
ressistance
RED/
BLK
1
No. 2
Ignition
coil control
BLK/BLU
2
To D on this page.
BLK/ORN
3
BLK/
ORN
NO. 2
IGNITION
COIL
RED/
WHT
1
BLK/BLU
2
BLK/ORN
3
NO. 4
IGNITION
COIL
RED/
GRN
1
BLK/BLU
2
BLK/ORN
3
NO. 6
IGNITION
COIL
2
4
2
E-18
2
RED/BLK
13
No. 4
Ignition
coil control
3
RED/WHT
35
E-22
No. 6
Ignition
coil control
4
RED/GRN
E-16
YEL
67
6
From D, E and F on this page.
1
BLK/BLU
From A, B and C on page 20.
4
BLK/BLU
Coil Module
C.Q.
Signal
input
E-16
RED
68
5
Knock
signal
input
ION
SENSING
MODULE
E-21
E-17
E-18
E-29
See Ground
Distribution,
page 14-10.
E-17
ION
SENSING
MODULE
BLK/BLU
BLK/BLU
BLK/BLU
BLK/BLU
BLK/BLU
BLK/BLU
BLK
CONDEN-
SER
BLK
To E on this page.
To F on this page.
Coil Module
A
B
C
D
E
F
D
E
F
E-45
E-40
E-41
E-42
E-40
E-41
E-42
ENGINE or
POWERTRAIN
CONTROL
MODULE
(ECM or PCM)
Solid State:
Do not check
ressistance
Circuit Schematic
20-2
IGNITION SYSTEM
(Refer to Section 201 for photographs.)
Component
Photo No.
Condenser
Top right front of engine
10
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dash Fuse Box
Behind left dash side trim panel
55
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine or Powertrain Control
Module (ECM or PCM)
Right side of engine compartment
60
. . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ION Sensing Module
Top of engine
28
. . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 1 Ignition Coil
Right side of engine
11
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 2 Ignition Coil
Left side of engine
12
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 3 Ignition Coil
Right side of engine
11
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 4 Ignition Coil
Left side of engine
12
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 5 Ignition Coil
Right side of engine
11
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No. 6 Ignition Coil
Left side of engine
12
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
E-45 (1-BLK)
Top right front of engine
. . . . . . . . . . . . . . .
H-6 (16-BLU)
Left side of engine compartment
33
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-7 (20-BRN/WHT)
Below I/P, above left dash side trim panel, on bracket
69
. . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
Ground
E-29
Top left side of engine
32
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Operation
With the starter switch in ON or START, battery voltage
is applied to the Engine (M/T) or Powertrain (A/T) Con-
trol Module (ECM) or (PCM), the ION sensing module,
various engine sensors, and the ignition coils. When
the engine is cranked to start, the crank shaft position
(CKP) sensor sends timing information directly to the
ECM/PCM, which sends a signal to the ION sensing
module, which breaks the ground path in the primary of
the ignition coils, thus creating a high voltage second-
ary impulse which fires the spark plugs, and the engine
starts. The ECM/PCM receives information such as fir-
ing order and starting timing at each ignition coil from
the CKP sensor. The ECM/PCM relies on information
from various engine sensors to determine correct igni-
tion timing.
Component Location Index
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